"It may be only that," said Meldon, "but it may be more. The proper person to judge of its importance is me. You must have frequently observed, doctor, that the man to whom an idea occurs is not by any means the best judge of its value. Sometimes he thinks too much of it. Take Galileo, for instance. He hit upon the fact that the earth goes round the sun, and it struck him as immensely important. He gassed on about it until everybody got so tired of the subject that the authorities had to put him in prison and keep him there until he said it wasn't true, and that he'd stop writing books to say it was. As a matter of fact it was true, but it didn't matter. We'd all be doing exactly the same things we are doing to-day if he had never made his beastly telescope. On the other hand, men who get a hold of really important ideas often think very little of them. Look, for example, at the case of the man who first thought of collecting a lot of people together and making them pass a unanimous resolution. He didn't even take the trouble to patent the process, and now there's no record left of when and where he hit upon his idea. And yet, where would we all be without unanimous resolutions? Doyle will tell you that government couldn't be carried on and civilisation would practically become extinct. It may be the same with this idea of yours, and I've no doubt that I'll be able to judge if you tell me what it is."

"He was thinking," said Doyle, "of having a picture of an apple tree in the top left-hand corner of the address with apples on it, and the same tree in the top right-hand corner with no apples. He says it would be agreeable to the sergeant."

"I don't think much of that," said Meldon. "It strikes me as a poor idea, for three reasons. In the first place, you'll not be able to get an artist who can draw the apple trees so that any ordinary man could recognise them. I know what I'm talking about, for apple trees necessarily come a good deal into ecclesiastical art, the kind of art I'm most familiar with. I give you my word that the most of them might as well be elms, and I've seen lots that look like Florence Court yews. As a general rule, you wouldn't have a ghost of a notion what they were meant for if it wasn't for Eve and the serpent. In the next place, I don't think the sergeant would care for it. The whole business must be painful to him, and he won't care to be obliged every day of his life to be staring at something that would remind him of Simpkins. In the third place, it would almost certainly irritate Simpkins when he heard of it."

"It's that," said Doyle, "that we were hoping it might do."

"Well, then, you may put the idea out of your heads. I can't have Simpkins irritated at present. It's of the utmost possible importance that he should be lulled into a sense of security. I can't deal with him if his suspicions are aroused in the slightest. I've been with him myself this morning, lulling him."

"Were you, then?" said Doyle.

"I was, and I think I may say that for the immediate present he's lulled."

"And how did you like him?" said Doyle.

"My feelings don't matter," said Meldon. "As a matter of fact, judging from a single interview, I should say he was a pleasant enough, straightforward sort of man who is trying to do what is right."

"If he tried less," said Doyle, "he'd get on better."